beattie



March 20, 1956 H. s. BEATTIE HIGH SPEED PRINTING MECHANISM OriginalFiled Feb. 17, 1948 7 Sheets-Sheet 1 INVENTOR MACE s. BUT/l! B) 146! JArro NEY March 20, 1956 H. s. BEATTIE HIGH SPEED PRINTING MECHANISMOriginal Filed Feb. 11. 1948 7 Sheets-Sheet 2 lNVE/VTOI? #01646! 6.854777! 6709,? 5%

March 20, 1956 H. s. BEATTIE HIGH smao pam'rmcmcnmxsu Original FiledFeb. 1?, 1948 7 Sheets-Sheet 3 m T m N I HORACE 8. 553477 ATTOR/V'VMarch 20, 1956 H. s. BEATTIE HIGH SPEED PRINTING macwmxsu Original FiledFeb. 17. 1948 7 Sheets-Sheet 4 E Q Q w S m. a

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HIGH SPEED PRINTING MECHANISM Original Filed Feb. 17, 1948 7Sheets-Sheet 5 INVHVTOR.

HORACE 5, 8547715 BY Match 20, 1956 s, -r11: Re. 24,131

. HIGH SPEED PRINTING MECHANISM Original Filed Feb. 17; 1948 7Sheets-Sheet 6 IN VEN TOR.

E By HORACE 5. 51547776 7 Sheets-Sheet 7 H. s. BEATTIE HIGH SPEEDPRINTING lmcmmsu March 20, 1956 01-1 mm fined Feb. 17, 1948 UnitedStates Patent HIGH SPEED PRINTING MECHANISM Horses 8. Besttle, DutchessCounty, N. Y., to International Business Machines Corporation, New York,N. Y, a corporation of New York No. 2,661,683, dated December 8, 1953,Serial 0. 8,929, February 17, 1948. Application for relslle March 14,1955, Serial No. 494,303

22 Clllllll- (CL 101-93) Mattsrsnelosedlnheavybracketsllappearshtbepatentbutformsnopartofthlsrelssuespecltlmstterprlntedhiltslicsindlcatestheaddltlonsmsdsbyrelmue.

This invention relates to printing devices and more particularly toprinting devices controlled by designations in a record to print asuccession of characters.

The principal object of the invention is to provide a novel high speedprinting apparatus inwhich a plurality of characters are spaced incolumns and rows on the surface of the segment of a sphere whose sphericcenter is located opposite a printing point past which a receiving stripor sheet is fed. To select a character for printing, the segment istilted to bring the desired character opposite the printing point.Thereafter, the segment with its center is thrown bodily against thepaper to make an impression thereon of the selected character.

A more specific object of the invention is to provide a simple controlmechanism for selectively positioning the spherical segment so that itmoves directly from one character to the next without returning to itsinitial position.

A still further object of the invention resides in the provision of arecord sensing mechanism for sensing character designations in a recordcard or strip in successive order and during uninterrupted movement ofthe strip with the character selecting devices coordinated so that eachsucceeding designation is sensed while an impression is being taken inaccordance with the preceding selection.

Other objects of the invention will be pointed out in the followingdescription and claims and illustrated in the accompanying drawings,-which disclose, by way of example, the principle of the invention andthe best mode which has been contemplated of applying that principle.

In the drawings:

Fig. l is a front elevation of the apparatus.

Fig. 2 is a plan elevation of the apparatus.

Fig. 3 is an isometric view showing part of the character selectingmechanism with the connections tothe impression elements. a

Fig. 4 is a diagram of the scheme of connections.

Fig. 5 is a diagram showing the arrangement of the characters on theimpression element looking toward the platen.

Figs. 6, 6a, and 6b are detail position views of parts of the selectedmechanism. I

Fig. 7 is an isometric view of one of the selecting magnets andassociated devices.

Fig. 8 is a detail of the type carrier and its supporting elements.

Fig. 9 is a wiring diagram with the record sensing mechanismincorporated therein.

Fig. 10 is a chart depicting the timing of various components of theapparatus.

Referring to Figs. 1 and 2, the apparatus is supportedonabasellltowhichissecuredaverticslfmntplste 11 and back plate 12 tiedtogether by cross bars 13. The top plate 14 fastened to cross bars 13supports the paper and ribbon mechanism. .The printing platen isrepresented at 15 (Fig. 2) and is rotatable on a stud 16 in plate 14. Apaper strip 17 is fed from a suitable supply roller around the platenand between a feed roller 18 and spring-pressed follower 19. An inkribbon 20, fed from a suitable source, is guided across the platen infront of the paper strip 17 by guide rollers 21 and is advanced by afeed roller 22 and spring pressed follower 23.

Rod 24 upon which roller 22 is secured, carries a gear 25 (see also Fig.l) which through an idler 26 meshes with a similar gear 27 on the rod 28supporting paper feed roller 18. The rod 28 has worm and wheelconnection 29 with a shaft 30 which carries a gear 31 meshing with anidler 32 which in turn meshes with a gear 33 secured to main drive shaft34. This shaft is continuously driven, and through the chain of gearingtraced, it will be noted that with the shaft 34 in motion the paperstrip 17 and ink ribbon 20 move with a continuous uninterrupted motion.

Referring to Fig. 9, shaft 34 is diagrammatically represented as drivenfrom a motor M through reduction gearing 35. Through further gearinggenerally designated 36 a shaft 37 is driven and this, through rollers38, serves to feed a record card 39 past a row of sensing brushes 40 andcontact roller 41 with a continuous movement.

The record card 39 is provided with columns designated 42 in whichperforations 43 are combinationally made in six rows designated 44 torepresent difierent characters. Rows 44 are divided into an upper set ofthree designated V and a lower set of three designated H withthe'individual rows in the sets designated as 2, --1, and +4.

v The following Table I lists the characters that may be represented andthe particular perforation combinations for each. Thus, for example, thenumeral 2 is represented by holes in the +4 row of field V plus holes inall tlfree rows of field H.

TABLE I NHHNNNHHNHNNNNNNHNNNNNNHHN It Table I.Continued Each sensingbrush is connected to one of a group of magnets which are designated toidentify them with the rows with which each is associated. Thus, as thecard passes brushes 40, the magnets 45 will be repeatedly energized incombinations corresponding to the perforation arrangement. The circuitextends from current line 46, through cam controlled contacts 47(operated by cams on shaft 34), contact roller 41, holes in the card,brushes 40, magnets 45 to opposite line 48.

The gear ratio between each half revolution of shaft 34, and-thecontacts 47 are adjusted to repeatedly make and break the circuits whilethe columns are sensed.

A print magnet 50 is wired to contacts 47 so that it is energized onceeach half cycle of shaft 34 in time with the period of energization ofmagnets 45. In the operation of the device, card 39'is placed inposition as diagrammatically shown with brushes 40 in advance of thefirst column of perforations. Thereafter, switch 51 is closed to supplycurrent to motor M and shaft 34 will be driven to advance the card andcontacts 47 will complete the sensing circuits and concurrently energizethe print magnet 50.

Referring now to Figs. 1 and 3, shaft 34 has secured thereto a cam 52which cooperates with a bell crank follower lever 53 pivoted at 54 andnormally biased by a spring 55 in a clockwise direction. The lowerextremity of the lever is engaged by armature 56 of magnet 50, so thatwith the magnet deenergized, the lever is res against following thecontour of the cam. Upon energization of magnet 50 with the parts in therelative position shown in Fig. 1, lever 53 is rocked by spring 55 toturn clockwise under control of the cam 52 and will draw a link 57downwardly. Pins 110 in cam 52 serve to engage a finger 111 extendingfrom armature 56 to restore the latter. The link 57 connects with ahammer 58 pivoted freely on a rod 59 supported by a block 60 secured toplate 11.

The rod 59 whose upper end carries a cage 62 63 extending through holesin the lever 61, so that the cage may oscillate in a vertical plane.Secured to one of the rods 63 is a pulley segment 64 with a finger 65upon which a spring 66 acts tourge the segment in a counterclockwisedirection. A cable 67 through selecting mechanism yet to be described,will draw the segment clockwise or will slacken toallow spring 66 torock the segment counterclockwise. the parts as in Fig. 8, spring 66acting through segment 64 urges lever 61 clockwise against a limit stoppin 68. Accordingly, when magnet 50 is energized, cam 52 will rockhammer 58 against the lever 61 to rock the latter in a counterclockwisedirection.

Cage'62 has a vertical rod 69 therein to support a stem 70 which maythus oscillate in a horizontal plane about rod 69. A spring 71 extendingbetween rod 63 and stem supports a vertical lever 61 (see Fig.8) havingintegral rods shafts 34 and 37 is such thatone column 42 of the cardpasses the line of brushes for In the normal position of I 70 (Fig. 3)biases the stem in one direction and a cable 72 through the selectormechanism may pull the stem in the opposite direction against the springaction or may slacken to allow the spring to rock the stem.

From the foregoing, it will be noted that a socalled universal joint isprovided with the point of intersection of the axes of rods 69 and 63constituting a point about which stem 70 can be rocked in any direction.The left end of stem 70 (as viewed in Figs. 3 and 8) has secured theretoa type carrier or head 75 which has a spherical surface whose sphericalcenter is the point of intersection of the axes of rods 69 and [33] 63.The stem 70 lies normally in the plane of platen 15, and as the stem isrocked universally, any point on its surface may be brought into theplane of the platen or more specifically into a line extending from thepivot point to the axis of the platen. Accordingly, if the carrier is sopositioned and hammer 58 is then actuated, the presented point of thecarrier will be impelled toward the platen and against the ribbon andpaper therebetween.

A plurality of type characters 76 are disposed on'the surface of thecarrier 75 arranged vertically in great circles and longitudinally inchordal circles as shown in Fig. 5. In this figure the characters areviewed looking toward the platen and in normal or rest position a blankspace directly below the character H is in line with the platen so that,if the hammer is actuated with the carrier in such position, no printingwill take place.

To select a character for printing, the carrier is shifted up or downand right or left from its normal position to bring the character intothe position initially occupied by the blank type element.

The horizontal rows or chordal circles are designated Va and thevertical columns or great circles are designated Ha, while theindividual rows and columns are designated +4, +3, +2, +1, 0, 1, 2, and3. These designations correspond to punching positions in the rows andcolumns of the record card wherein, it for the V and H fields thedesignated values for any character are algebraically added, the resultwill represent the extent of vertical and horizontal movement of thecarrier to present the related type for printing such characters. Forexample, the letter B (see Table I) is represented by V values 2 and +4and by H values 2, 1, and +4. Combining these algebraically, V equals +2and H equals +1. Turning to Fig. 5, it is seen that the letter B lies atthe intersection of the +2 chordal circle ordinate Va and the +1 greatcircle ordinate Ha, so that to present letter B for printing the carrieris to be shifted one column to the right and two rows down. In a similarmanner, other characters may be inspected and from Table I the extentand direction of movement of the carrier may be determined to presentsuch characters to the printing position.

Vertical positioning mechanism-T here is provided a separate mechanismfor elfecting the vertical positioning and this will be first described.Referring to Figs. 1, 3,

and 4, the cable 67 extends from segment 64 around a grooved wheel 80mounted on an [armature] arm of bell crank 81 pivoted at 82, thencearound a wheel 83 pivoted on the fixed plate 11, thence around a wheel84 mounted on a lever 85 pivoted at 86 and thence to the upper end of alever 87 to which it is secured.

The levers 81, 87, and 85 are all spring biased in a clockwise directionand may be rocked singly or in combination through the same angle in acounterclockwise direction. Theparts are so proportioned that, if lever85 is rocked alone, cable 67 will be slackened to allow spring 66 torock the carrier vertically to bring its +4 line of characters along theprinting line. If lever 8'. is rocked alone, cable 67 will be [givenslack so that its spring 66 will] tighten to rock the carrier verticallyto bring its 1 row to the printing line. If lever 81 is rocked alone,cable 67 will be [given sufiicient slack so that spring 66 will]tightened to rock the carrier vertically to bring its TosslectrowvaLeversrocked ss(+4;,s1(-1) F 85 +4 .Btf-fi;

1 86 +0.8! 2.B71) 8 4] 8l(2),87 -l) Horizontal positioningmachines-Cable 72 (Figssl, 3 and 4) connects at its right end to an arm90 integral j with a segment 91, from which a cable 92 extends aroundwheels 93 and 94 and thence around a system of wheels corresponding tothe system around which cable 67 extends.. The components of this lattersystem are identifled bythe same numerals as corresponding parts forcable 67, but distinguished by theletter a sufiixed thereto.

In the same manner the levers 81a, 87a, and 85a are related to thevalues 2, 1, and +4, respectively, and again rocking of the leversthrough the same angle singly or in combination will rock the carrier ina left or right direction to select an appropriate column of thecarrier.

Thus,

To select column Ha Levers rocked 85a +4 3 85a 5+4; 87a (-1) 859 +4), IE 858 2). 7 (-1) 87a (-1) 81a 5 -2) 81a 2), 87a (-l) the end of lever 81(in example) while hook 97 is not slotted. All the hooks are springbiased in a counterclockwise direction. f

'The six hooksJS lie in a common plane and in the plane of a slide 958which is mounted for horizontal reciprocation on posts 107. Spring 99serves to move it to the left while a cam 95C shifts it to the right.There .is a tooth 951 foreach hook 95 proportioned so that asshaft 34rotates, slide 95S will reciprocate its teeth 95T below the hooks and,if a hook is rocked about its pin 98, the hookwill be engaged andtherebetween the related lever 81 (for example) will be forcibly rockedthrough a predetermined angle.

The six hooks 96 also lie in 'a common plane and in the plane of a slide968 which is mounted in the same manner as slide 958 and isactuated by acam 96C on shaft 34 which has the same configuration as'cam 95C but ismounted on the shaft with a- 180 displacement, so that slides 95S and968 are reciprocated oppositely. Slide 968 has a tooth 961 for each hook96 and, if one of these hooks is rocked, it will be engaged by a relatedtooth to rock the related lever'counterclockwise.

6 to the right, engage and carry with it the tilted hooks and connectedlevers. These, through the difierential pulley wheel and cableconnections to the carrier will thereupon rock the carrier selectivelyin the appropriate direction to present the character corresponding tothe combination of holes sensed to the printing line, and at such timewhile the advanced slide 958 or 968 is in its extreme position, cam 52will trip the hammer 58 to throw the carrier against the platen andeffect an impression on the tape.

It will be noted in Fig. 6b that as a hook (96) is advanced by a toothin its related slide the free end of the hook slides beneath astationary block 105 which locks the hook in engagement with tooth 96'1andenables restoration of lever 100 shortly after slide 968 has begun tomove.

When the advanced slide is in its extreme position and just before itbegins to return, the circuit through the controlling card column willhave been broken and the next column will be at the sensing brushes. Thealternate slide will be about to begin its advance and circuits will becompleted to the magnets in accordance with the combinational punchingin this next card column to rock a new set of books accordingly foradvance by the alternate slide, while those previously ad vanced returnas the first slide moves to the left.

Provision is made so that, where a selected and advanced hook is againselected in response to the sensing of the next card column, such hookis not restored but is caused to remain in advanced position. For thispurpose a bar 106 (Figs. 1, 3, and 6) is provided which is fixedlymounted on posts l07-and has teeth 108 lying in the plane of movement ofthe latching hooks 97. When any lever (such as 81) is rocked, it willadvance its hook 97 to the position of Fig. 6 wherein a raised shoulder109 will lie'beneath lever 100. If now the same advanced lever is to beselected for the card column, i. e., in the next A revolution of theshaft 34, the related lever 100 will be actuated with hook 97 in theposition of Fig. 6 and the hook will be tilted to engage adjacent tooth108 in bar 106. This latching action takes place while the second slideis advancing and is maintained by frictional engagement of the hook 97with tooth 108, since at such time lever 81 is spring biased clockwiseand exerts a leftward pull on the hook. A slight undercutting of tooth97 serves to assist in maintaining the latched relationship until thenewly advanced book 95 or 96 picks up the lever and gives it a slightoverthrow suflicient to release the contact between 97 and 108.

return of the carrier to home position between successive printingoperations and, where the same character is punched in successivecolumns, the carrier will be posithe mechanism for rocking hooks 9s, 95comprises a lever 1 (Figs. 3 and 7) of which there is.one provided foreach of the six sets of hooks (see Fig. 1). This lever is pivoted at 101and is integral with armature 102 of a magnet 45 and isbiased upwardlyby a spring 103. The magnets 45 are selectively energized as explainedin connection with the circuit of Fig. 9.

Thesequence of operations is as follows. When a perforated column 42 ofthe record card 39 is beneath the sensing brushes 40, contacts 47 closeto complete circuits to magnets 45 in accordance with the coding of thecharacter sensed and the corresponding levers 100 will be rocked to tiltthe related hooks 95, 96. Shortly thereafter, one or another of theslides 958, 968 will move tioned upon the first sensing of the characterand then latched in such position for repeated printing therefrom.

Obviously, where the next character lies in the same row or column, thatrow-or column will have its selecting connections latched so that thecarrier is simply repositioned along the previously selected row orcolumn to the new character therein. To be more specific if (referringtoFig. 5) the letter Q is first selected, the carrier is moved up one rowand to the left two columns. If the next character selected is theletter U, the carrier remains in its upward position but shifts fourcolumns to the right.

By providing alternately operating slides 95S and 96S,

' high speed of operation is attained since while one slide and the tapeor entry receiving medium may also be in motion when the carrier isimpelled against it.

While there have been shown and described and pointed out thefundamental novel features of the invention as applied to a preferredembodiment, it will be understood that various omissions andsubstitutions and changes in the form and details of the deviceillustrated and in its operation may be made by those skilled in the artwithout departing from the spirit of the invention. It is the intention,therefore, to be limited only as indicated by the scope of the followingclaims.

What is claimed is:

1. In a printing apparatus, a type carrier having a surface forming partof 'a sphere and having a plurality of characters arranged in a greatcircle on said surface, means for mounting-said carrier for oscillationon its spheric center, means normally biasing the carrier in onedirection, restraining means therefor, a device for releasing saidrestraining means to enable the biasing means to rock the carrier insaid one direction a fixed predetermined extent, a further device forrocking the carrier in the opposite direction against its biasing meansa fixedextent less than said predetermined extent, and means forselectively rendering either or both of said devices efiective, wherebythe carrier will rock through a distance equal in extent and directionto either of said extents or to the resultant of the devices operated,respectively.

2. In a printing apparatus, a type carrier having a surface forming partof a sphere and having a plurality of characters arranged in a greatcircle on said surface, means for mounting said carrier for oscillationon its spheric center, means normally biasing the carrier in onedirection, restraining means therefor, a device for releasing saidrestraining means to enable the biasing means to rockthe carrier in saidone direction a predetermined extent, a second device for rocking thecarrier in the opposite direction against its biasing means one-half ofsaid predetermined extent, a third device for rocking the carrier in theopposite direction against its biasing means one-quarter of saidpredetermined extent, and means for selectively rendering all or anylesser number of said devices eifective, whereby the carrier will rockthrough an extent equal in extent and direction to the resultant of thedevices operated.

3. In a printing apparatus, a type carrier having a surface forming partof a sphere and having a plurality of characters spaced thereon, meansfor mounting said carrier for oscillation on its spheric center, aprinting .platen, said surface being normally positioned with its centeropposite the platen, means for rocking the carrier in one direction, asecond means for rocking the carrier in a transverse direction, controlmechanism for rendering both said rocking means jointly etfective tobring a selected character into printing position, latching devices foreach rocking means, and means for rendering either of said latchingdevices effective to latch the related rocking means to thereby hold thecarrier in rocked position for the related direction.

4. In a cyclically operable printing apparatus, means for sensing arecord for character designations arranged in columns, said meanssensing a column for each cycle of operation, a type carrier having asurface forming part of a sphere and having a plurality of charactersspaced thereon, means for mounting said carrier for oscillation on itsspheric center, a printing platen, an impression effecting device,selecting devices controlled by the sensing means for selecting acharacter for printing, means controlled by the selecting devices forrocking the carrier to present the selected character to the-platen, andcyclically operable control mechanism comprising dual actuating membersoperative in alternate cycles to alternately rock the carrier and forcausing said sensing, selecting, rocking and impression efiecting meansto operate in the order named for each cycle of operation, and in whichthe order of operations is such that operation of the impressionefiecting means in response to the sensing of one column is concurrentwith the sensing of the designations in the next column.

5. In a printing apparatus, a type carrier having a surprintingposition, and means for moving said carrier topresent a selected elementto the printing position, comprising a wire connected to the carrier atone end, a plurality of pulleys, an anchor, said wire extending from thecarrier and looped partly around each pulley to said anchor, and meansfor selectively varying the positions of said pulleys toward or awayfrom one another to thereby move the carrier an amount corresponding tothe extent of movement of the pulleys and spring means acting on thecarrier to keep the wire taut.

6. Ida printing apparatus, a type carrier having a surface forming partof a sphere and having a plurality of type elements spaced thereon,movable to pass through a printing position, and means for moving saidcarrier to present a selected element to the printing position, comprising a wire connected to the carrier at one end, a pulley located tonormally maintain a bend in the wire, an anchor, said wire extendingfrom the carrier and partly around said pulley to said anchor, and meansfor moving the pulley away from the wire a predetermined extent tocreate a slack in the wire, and a spring on the carrier to take up theslack so produced to thereby move the carrier to present a selectedelement to said printing position.

7. In a printing apparatus, [a type carrier] a part having a normalposition and movable to a second position, mean: for biasing said portto its normal position, [positioning mechanism for said carrier,including] a pair of elements mounted on said port so as to have one-'way driving connections therewith, [both arranged to position thecarrier,] a pair of cyclically operable actuators, one for each drivenelement, operable in alternate cycles, so that as one advances, theother restores, selectively actuable means for [engaging] disposing bothsaid elements for engagement with their actuators during a given cycle,

whereby the actuator advancingin such cycle will drive the relateddriven element to [position] move the [carrier] part from the normal tothe second position, spring means for causing the advanced drivenelement to return with its actuator during the next cycle, and meansefiective to prevent [said] the return of said part with "the ddvanceddriven element if said elements are [engaged] disposed for engagementwith the actuators during the said next cycle whereby the carrier willbe retained in the position to which it was moved].

8. In a printing apparatus, a type carrier, mounted for movement througha plurality of equally spaced positions, an anchor, a wire connectedbetween said carrier and anchor to normally hold the carrier in a homeposition, said carrier being spring biased against the wire to hold ittaut, guides normally positioned to hold said wire in a path of Ipredetermined configuration, and means for selectively changingthepositions of said guides and anchor to alter the path of the wire andthereby move the carrier to a rality of columns and rows of typeelements thereon, a

first operating wire connected to said carrier, means for drawing saidwire to move the carrier for presentation of,

an element in a predetermined row, a second operating wire to saidcarrier, means for drawing said second wire to move the carrier forpresentation of an element in a predetermined column, and means forrendering both said drawing means concurrently eflective to present theelement related to said predetermined column and row, said drawing meanscomprising an anchor to which the wire is connected, a pulley bearingagainst the wire at a point intermediate the carrier and anchor, andpower operated means for causing the pulley to move against the wire apredetermined extent.

II. In a printing apparatus, an element positionable according'to thecharacter to be printed, means for mounting said element for movement,means [or moving the element in one direction, a second means [or movingthe element in a second direction, control mechanisms for rendering therespective moving means individually or jointly efiective to positionsaidelement, latching devices for each of said means, and means operableby the respective control mechanisms for rendering the correspondinglatching devices eflective to hold the related moving means if theelement is already in the moved position for the related direction.

12. In a mechanism, a reciprocable actuator, an ,element to be movedfrom a normal to asecond position, means for drivenly connecting theelement to the actuator during one range of the latters movement formovement from the normal to the second position, means normallyoperative to return said element to the normal position during anotherrange of the actuator's movement, a fixed part, and other meansoperative to connect the element to the fixed part when the former is inthe second position to prevent a return thereof to the normal positionwhen the actuator returns.

13. In a mechanism, a reciprocable actuator, an element having a normalposition and movable to a second position, means for biasing saidelement to the normal position, first means operable to connect theelement to said actuator during one range of the latter's movement formovement from the normal to thesecond osition, selectively actuablemeans for operating the rst means, a fixed part, and other meansoperable by said selectively actuable means to connect the element whenit is in its second position to said part to prevent the return of theelement when the actuator restores.

14. In a mechanism, a pair of actuators reversely reciprocable betweenhome and advanced positions, a member movable from a normal position towhich it is biased to a second position, first means operable todrivenly connect the member when in home position to the actuator beingmoved from home position for movement to the second position, a fixedpart, and other means operative to connect the member to the fixed partif the first means is operated while the other actuator is being movedfrom home position and the member is. already in the second position.

15. In a mechanism for displacing an object difierent amounts, a pair ofactuators reversely reciprocable between home and advanced positions, aplurality of members each of which is movable from a normal position towhich it is biased to a second position, first means operativelyconnecting said members with said object to impart correspondingincrements of displacement there-.

to when they are moved from the normal to the second positions, secondmeans for the respective members operable to connect them to theactuator being moved from home-position for movement to the secondposition, a fixed part for each of said members, third means for each ofthe respective members operable to connect the member to thecorresponding fixed part'when the member is in the second position, andselectively actuable means for the respective members efiective tooperate the corresponding second and third means.

16. In a cyclically operated print mechanism wherein successivecharacters are designated in respective cycles by combinations of one ormore difierent signals of a set, an impression determining elementpositionable positions in every two cycles, members for each of thepossible diflerentsignals of a set and each movable from a normalposition to which it is biased to a second poaition, first meansoperatively connecting said members with said impression determiningelement to impart corresponding increments of displacement thereto whenthey are moved from the normal to the second positions, second means forthe respective members operable to con nect them to the actuator beingmoved from home position in that cycle for movement to the secondposition. a fired part for each of said members, third means for each ofthe respective elements operable to connect the member tothecorresponding fixed part when the member is in the second position, andother means for each of the possible diflerent signals of a set actuablethereby to operate the second and third means for the correspondingmembers.

17. In a device for disposing a member biased to a normal position in asecond position, a cyclically reciprocable actuator, a first pawlpivotally mounted on said member and biased to a normal position out ofthe path of said actuator, a fixed part, a second pawl pivoted on saidelement and biased to a normal position in which its path is notinterrupted by said fixed part, and means operable to move the firstpawl into the path of said actuator if the member is in the normalposition to cause the actuator to movethe member to the second positionto position the second pawl so that the fixed part lies in its returnpath if the member is already in the second position to prevent themember from restoring when the actuator restores.

18. In a device for disposing a member biased to a normal position in asecond position, a first and a sec-.

and actuator reversely reciprocable between home and advanced positions,a first and a second pawl slidably and pivotally' mounted on said memberand biased tonormal positions out of the path of the respectiveactuators, a third pawl pivoted on said member and displaceabletherewith, a fixed part so located as to enable the third pawl to bemoved therebehind when the member is in the second position, and meansoperable to move the first and second pawls for the driven engagement ofone with the corresponding one of the actuators being moved from homeposition to move the member to the second position if it is in thenormal position and to move the third pawl behind the fixed part if themember is already in the second position to prevent its return towardsthe normal position when the actuator in the advanced position restorestoward home position.

19. In a device for disposing a member biased to a normal position in asecond position, a first and a second actuator reversely reciprocablebetween home and advanced positions, a stop, a first and a second pawlslidably and pivotally mounted on said member and biased to normalpositions out of the path of the respective actuators and in engagementwith said stop, a third pawl pivoted on said member and displaceabletherewith, a fixed part so located as to enable the third pawl to bemoved therebehind when the member is in the second position, and meansoperable to move the first and second pawls for the driven engagement ofone with the corresponding one of the actuators being moved from homeposition to move the member to the second position if it is in thenormal position and to move the third pawl behind the fixed part if the.sn'ember is already in the second position to pre. :nt'its returntowards the normal position with the return of the driven pawl towardthe stop when the actuator in the advanced position restores toward homeposition.

20. In a device for disposing a member biased to a normal position in asecond position, a first and a second actuator reversely reciprocablebetween home and advanced positions, a stop, a guide, a first and asecond pawl slidably and pivotaliy mounted on said member and biased tonormal positions in engagement with said stop and said guide and out ofthe path of the respective actuators, a third pawl pivoted on saidmember and displaceable therewith and biased to a normal relationship inengagement with said guide, a fixed part so located 'as to enable thethird pawl to be moved therebehind when the member is in the secondposition, and means operable to move the first and second pawls from theguide for the driven engagement of one with the corresponding one of theactuators being moved from home position 'to move the member to thesecond position if it is in the normal position and to move the thirdpawl from engagement with the guide and behind the fixed part if themember is already in the second position to prevent its return towardsthe normal position with the return of the driven pawl towards the stopwhen the actuator in the advanced position restores toward homeposition.

21. In a device for disposing a member biased to a normal position in asecond position, a first and a second actuator reversely reciprocabiebetween home and advanced positions, a stop, a guide, a first and asecond pawl slidabiy and pivotaily mounted on said member and biased tonormal positions in engagement with said stop and said guide and out ofthe path of the respective actuators, the normal position of said memberbeing determined by engagement with said pawls in engagement with saidstop, a third pawl pivoted on said member and displaceabie therewith andbiased to a normal relationship in engagement with said "guide, a fixedpart so located as to enable the third pawl to be moved therebehind whenthe member is in the second position, and means operable to move thefirst and second pawls from the guide for the driven engagement of onewith the corresponding one of the actuators being moved from homeposition to move the member to the second position if it is in thenormal position and to move the third pawl from engagement with theguide and behind the fixed part if the member is already in the secondposition to prevent its return towards the normal position with thereturn of the driven pawl towards the stop when the actuator in theadvanced to the second position, and latch means operable by theoptionally actuable means if the latter is actuated again before thepart has moved from the second position to hold the part in the secondposition [or the ensuing cycle.

Reierences Cited in the file of this patent or the t original patenUNITED STATES PATENTS 393,259 Perry Nov. 20, 1888 420,692 Miller Feb. 4,1890 435,654 Perry Sept. 2, 1890 442,021 Davenport Dec. 2, 1890 446,719Stover Feb. 17, 1891 723,567 White -1 Mar. 24, 1903 939,965 Aronson Nov.16, 1909 1,139,689 Lyon May 18, 1915 1,750,191 Pierce Mar. 11, 19301,909,550 Pierce May 16, 1933 1,997,167 Bryce Apr. 9, 1935 2,036,024Daly Mar. 31, 1936 2,076,717 Fuller Apr. 13, 1937 2,090,920 Stuivenberg'Aug. 24, 1937 2,181,996 Knutson Dec. 5, 1939 2,381,862 Beattie Aug. 14,1945 FOREIGN PATENTS 555,009 Germany July 19, 1932

